Yarn drying apparatus



YARN DRYING APRATU g Filed may 2, '1942 onf.. 5

May 4, 1943. C. E. MQALLlsTl-:Rg

.YARN DRYING APIfARATUs Filed may 2,- 1942 4 sheets-sheet :s

Symaentorx,l .MG ALLlsTER "Grtt'omgs ing. The closed Patented May-4jy 2,318,511 YARN DRYIG ArPARATUs Clifton E. McAllister, Batesburg, C. Application May z, 1,942, serial No. 441,498 claims. (01.'34-114) This invention relates to an improved drying apparatus for textile materials such as yarn and the like.

It is an object of this invention to provide a drying apparatus in which the guide rollers for the material are housed in such a 'manner that highly eiective drying operations will result when currents oi air are directed through the housings. positioning an open-sided housing on `each side of the guide rollers so that the open sides will `be oppositely each. other a small amount. Then a draft of 'I'his improved result is obtained by disposed and spaced apart from warm air is forced from one housing, over the rolls and the material, and into the second housing. The construction of tlis apparatus is such that the air may escape by way of the space betweenthe housings and/or suitable doors in the .second housing. v

It is another object of this invention to provide a vdrying apparatus of the class described in which the opening in the second housing is somewhat larger in size than'the oppositelyl disposed opening in the first housing, but similar in shape, thereby providing a passageway around the mouth of the rst housing for the escape of currents of air which rebound upon engagement with the interior of the second housing.

It is another Vobject of this invention to provide a braking mechanism in combination with a 'letoil' beam, a drying apparatus, 'and a warper, wherein the actuation of the conventional warper stop motion willV cause a brake to be applied to the let-on' beam.

This brake will overcome the 'momentum ofthe beam and prevent unwinding of cthe letoil beam after the warper has been stopped. Itno braking action is provided the momentum or the let-oil beam will cause this beam to rotate for a portion of a revolution after the warper has stopped. This additionalV rotation will produce an undesirable slack in thecyarn or 'material as it is being delivered to the drying mechanism. It is another object of this invention to provide a yarn drying apparatus having a housing cony struction' as above. described. which apparatus has associated therewith al suitable heating unit capableof circulating currents oi air over the material which is being dried. In other words,

- the-air is driven from smallerI housing, being dried. and

heating units, into the through the material which-is. then into a second larger housend of the seeond'housing reversesthe air currents, and directs the same back.` .through the 'material to be dried. Such a construction will insure an improved drying ei-v ciency.

It is another object oi' the invention to provide a drying apparatus which is especially desirable forri use in drying warp beamswhich have rbeen vat-dyed. This yarn has a high moisture conapparatus especially suittent, thus making this able for drying the same.

Some oi the objects of the invention having I been stated other obiects will appear as the description proceedswhen taken in connection with the accompanying drawings'in which- Figure, 1 is a plan view of my improved drying apparatus, used in association with a. let-ofi.' beam, a warper, and a take''up .beam;

Figure 2 is `an elevation, looking at the near side of Figure 1':

Figure 3 is a vertical sectional view taken along the line 3 3 in Figure 1 showing the interior construction of the drying apparatus;

Figure 4 is a sectional view taken along thel line 4-4 4in Figure 1.

Referring more .particularly to the drawings the numeral I0 indicates suitable supports boetween whichv a let-oir beam Il mounted. This'let-oi beam has head portions I2. Each head Aportion has a peripheral groove I4 therein for the rope I5, saidtrope support I0 as at I1 and having suitable weights I1 removably secured-to the other endthereof.

accommodation of a cord or The intermediate portion of the cord I 5 rests on the periphery oi' the beam head I2 and in the groove I4, thereby providing a normal lfriction which resists the rotation of the beam II.

' The beam I'I such l yarn on this beam is usually vatdyed,'bleached, or otherwise treated. Material', such;Y as warp threads I8, passes ,upwardly between squeeze rolls I3 and Ita, which have aztrough 9 below the same. 'I'hen the yarn passes through a conventional comb I9, over guide roller 20, beneath roller 2I, over roller 22,

roller 24, beneath roller 25, over guide roller. 26,

and then'through a conventional warper '21. with a comb I0 through I8.passes and is also providedv n This warper is provided which the warp with rollers 3|, 32, 33 and 34 which direct the warp I8 through the warper. After' leaving the onto a suitable takeis rotatably having one end secured to the is adapted to vhave a material as a wet warp I 8 wound therearound. The s beneath roller 23, over from any suitable thereof rotatably supported by a framework open side of an upper housing broadly desig.

nated by the reference character 46.

By observing Figure ing 46 is rectangular in shape and is so designed that its horizontal projection will entirely cover all of the rollers 26 to 26 inclusive as well as provide a substantial amount of covering beyond the ends and sides of the roller assembly. The elevation of the brackets 44 is substantially the same as the elevation of the axes of rotation of the rollers 20, 2|, 22 and 24 are located at a l the remaining rollers, and therefore are disposed well within the housing 46. i

Although the upper end of ,the housing 46 is normally closed, suitable access and Ventilating doors 48 are provided. These doors are hingedly secured to the housing 46 by means of butt hinges 49 and may be opened to dotted line position as shown in Figure 2 when it is desired to gain access to the interior of the housing. Also these doors can be propped in partially opened position for allowing air currents to escape, by any suitable means such as struts 41 (see upper central portion of Figure 2).

The sides of the housing, which are adjacent the ends of the rollers, Ahave sliding access doors 50, said doors being supported by suitable guideways 5I. An opening 52 is provided adjacent each sliding door 50, which opening may be employed as an access port. For illustration purposes (Figures 2 and 3) Vthe openings 52 are shown partially closed by'sliding doors 50. During normal operation, however, it is usually desirableto completely close these openings so as to secure a more effective drying action.

In order to provide an opening whereby the yarn I8 canpass into, and out of, the housing 46, the end portions of the housing 46 are cut away as at 53 and 54 (Figure 3). These cutawayportions will permit the yarn I6 to pass onto the rollers within the housing, as well as permit this same yarn to pass from the rollers and out of the housing. Also when the housing 46 becomes filled with-heated air to a point of overflowing,thepassageways 53 and 54 permit the rebounding currentsr ofair toescape.

23, 25 and 26. The rollers Associated withithe rollers 20 to 26- inclusive and disposed onfthe I8 from the housing opposite` side of the yarn 46, is an inverted frustropyramidal-liousing 55.-- The upper end of this housing is open. This upper open end has a shape similar to the lower open end of the housing 46; however, the open end of housing 55 is smaller vin size, and therefore when properly positioned the perimeter of this opening is disposed inwardly in spacedv relation to the perimeter of the opening in housing 46. l

Figure 4 clearly shows the relation of the open ends of housing 46 and 55. This space between the openings is indicated by the reference character 51, said space being provided to permit the rebounding currents of air which ow upwardly into ,the housing 46 to` escape in the same ymanner as the currents escape through openings described. The yarn is hot air as the air passes 53 -and 54 previously therefore subjected to 1 it is seen that the hous higher elevation than its other end, said collar in substantially para11e1 become heated by the air which passes therearound and the heat from these rollers serves to dry the yarn when the same is contacted. The rollers 20 to 26 are not internally heated and therefore do not parch the yarn.

Leading from opposed sides of the lower'housing 55 are ducts 62 and 63.- The outer end of each vof these ducts has a heating unit 64 associated therewith, each of said heating units comprising a plurality of pipes 65 through which steam or other heating fluid is adapted to be circulated. A motor fan unit 66 is provided for directing air over these pipes. Vanes 61 may also be employed for directing' and regulating the currents of air after leaving the pipes 65.

The hotl air is directed into ducts 62 and 63 and into the lower portion of housing 55. As a means for directing these currents of air upwardly onto the rollers 20 to 26 inclusive and onto the yarn I6, a suitable arcuate baille plate 58 is provided for each heating unit, each plate being located in the lower central portion of housing 55 (Figure 3). Bafe plates 68 extend upwardly to approximately the same level as the upper portions of ducts 62 and 63 and thereby prevent the currents of air from the oppositely disposed ducts 62 and 63 from mixing with each other until the same are moving upwardly in the same direction.

The heat units 64 are supplied with vheat such as steam which is conducted thereto by way of pipes 69.

As heretofore stated the momentum of the letoi beam I l must be controlled during the normal operation of the drying apparatus on account of the swift movement of yarn i8. If for any reason a thread becomes broken and the warper 21 automatically stops, it is then necessary that the letoff beam l l 'stop as quickly asv possible to prevent an excess slack in the warp i8. In order to accomplish this result, a suitable braking mechanism is employed which is adapted to be actuated by the stop motion mechanism of the warper 21.

This braking. mechanism, in part, comprises a shoe 12 which is normally disposed in spaced relation to the periphery of beam head i2. The shoe is rockably' mounted on the free end of a beam or lever-13, which beam has a collar 14 on being slidably mounted upon the intermediate portion of another beam 15.

The two beams 13 and 15 overlap and remain position; however, it is necessary to adjust the distance between the' free ends of the two beams in order that the brake shoe 12 will be disposed the proper distance from the periphery of beam head I2. This adjustment is effected by means of a bolt 16 which has one end secured to the beam 13 and its other end penetrating the end of the beam 15. A nut 11 is disposed on the upper end of bolt 16 and may -be manipulated to vary the position of the free end y beam' 'I5 is prevented (see Figures the warper 21. This stop motion arm has its outer end weighted, and therefore when the arm falls the weight will depress the right-hand end of beam and cause the left-hand end thereof, together with the associated beam 13 and brake shoe 12, to rise upwardly to effect a braking action upon left-oil' beam l I.

Lateral movement of the right-hand endV of 2 and 3) by the provision of a forked bracket 82.

When the warper stop motion is operated, the driven beam 38 is also stopped by conventional means, not shown.

It is therefore seen that immediately upon the actuation of the conventional warper stop motion, the brake shoe 'l2 is thrown into engagement with the let-off beam head I2 to cause the braking action to be applied. This braking action supplements the normal braking action provided by chords l5 and weights l1.

In the drawings and specification, there has been s'et forth a preferred embodiment of the invention, and although specic terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation,`the

scope of the invention being dened in the claims.

I claim: k

1. Drying apparatus comprising a plurality of rollers over which yarn and the like is adapted to be passed, an inverted ing disposed below said rollers, ing an open' upper side disposed in close proximity to the llower periphery of said rollers, a second imperforate housing disposed over said rollers and over the open upper end of said first housing, said pyramidal shaped houssaid housing havsecond housing having an open lower side of larger size and similar shape .to said rst named opening, and means for directing currents of air upwardly through said rst housing, over said yarn and into said second housing and tanning outwardly in all directions through the space -between-the edges of the upper and lower housing and into the atmosphere in the order named.

2. Yarn drying apparatus having an open *upper side over which yarn is adapted -to pass, means for movably supporting comprising a housing second housing having a lower open side of larger size and similar shape to the first open` side, the horizontal projection of said lower open side extending laterally beyond the edges of said' upper open side, whereby an outlet will be provided between said open sides, a pair of oppositely disposed heating units inthe lower sidewalls of said lrsthousing, a concave baiile plate for each of said units, the concave side of` each baille facing its associatedv heating unit and having its upper end lying in a substantially vertical plane, and :means for directing currents 'of air over said heating units, whereby the heated air will be directed upwardly by said baiiies, through said yarn againstthe ceiling of the second housing and then rebound through the yarn 'and pass outwardly into the room atmosphere through the opening between the open sidesv of the housings. 3. In yarn drying apparatus, a framework, a plurality of lower rollers mounted in lspaced parallel relation in the framework, a plurality of upper rollers mounted in spaced parallel relation and being disposed above the spaces between the lower rollers, so that yarn can be passed beneath the lower rollers and above the upperorollers successively through the apparatus, the rollers being made of a metal which has high heat absorbing qualities, an upper imperforate hood covering the upper rollers, and having 'its lower side open, an open-topped lower hood disposed below the lower rollers and having upwardly and outwardly inclined endwalls and sidewalls, providing an opening similar in shape but lesser in size than the open lower side of the upper hood, a baille plate in the lower central portion of the lower hood for directing blasts of air upwardly, a duct leading from each end wall oi the lower hood, a heating and blowing mechanism in each duct for lforcing air into the lower portion of the lower hood, up into the upper hood and causing atmosphere by passing through the openings between the edges of the upper and lower hoods. CLIFTON E. MCALLISTER.

it to spin into the 

